Amid today’s global immigration crises, wealthy governments are seeking ways to keep out newcomers. Border security measures (typically more sophisticated than U.S. President Donald Trump’s wall) are often first on the list. But other ideas are gaining adherents as well. In the European Union and elsewhere, policymakers are betting that investment and trade will reduce migration from less developed countries. Put money into export-oriented jobs where the would-be workers are, the theory goes, and fewer will leave in search of opportunities elsewhere. READ MORE